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WO2007028916A1 - Nacelle cowling for turbojet and nacelle comprising at least one such cowling - Google Patents

Nacelle cowling for turbojet and nacelle comprising at least one such cowling Download PDF

Info

Publication number
WO2007028916A1
WO2007028916A1 PCT/FR2006/050804 FR2006050804W WO2007028916A1 WO 2007028916 A1 WO2007028916 A1 WO 2007028916A1 FR 2006050804 W FR2006050804 W FR 2006050804W WO 2007028916 A1 WO2007028916 A1 WO 2007028916A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
nacelle
hood
movable
fixed part
Prior art date
Application number
PCT/FR2006/050804
Other languages
French (fr)
Inventor
Hervé Marche
Original Assignee
Airbus France
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Airbus France filed Critical Airbus France
Priority to US12/065,629 priority Critical patent/US8091832B2/en
Priority to JP2008529665A priority patent/JP4852611B2/en
Priority to BRPI0615736-0A priority patent/BRPI0615736A2/en
Priority to DE602006006693T priority patent/DE602006006693D1/en
Priority to EP06808245A priority patent/EP1922251B1/en
Priority to AT06808245T priority patent/ATE430690T1/en
Priority to CA2621216A priority patent/CA2621216C/en
Publication of WO2007028916A1 publication Critical patent/WO2007028916A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D29/00—Power-plant nacelles, fairings, or cowlings
    • B64D29/08—Inspection panels for power plants

Definitions

  • Nacelle hood for turbojet and nacelle comprising at least one such hood.
  • the invention relates to a nacelle hood for an aircraft turbojet engine. More specifically, the invention relates to a nacelle hood adapted to have at least one closed position, in which the hood completely covers a turbojet engine housed in the nacelle, and an open position, in which the hood is remote from the turbojet, so as to allow an access to said turbojet engine.
  • the nacelle of an aircraft turbojet engine generally comprises two covers, respectively right cover and left cover placed on either side of the turbojet fan. Each bonnet has a section in an arc in a transverse plane of the nacelle, following a semicircular outer contour of a right flank and a left flank of the turbojet engine.
  • At least one of the two covers of the nacelle can be opened to allow access to various equipment and systems housed inside the nacelle.
  • the upper edge of the hood is articulated on the upper part of the turbojet engine.
  • the upper edge of the hood is rotatably mounted on the upper part of the turbojet so as to allow the pivoting of said cowl from a low position in which it follows the outer contour of a side of the turbojet, to a high position. in which it is raised relative to the turbojet engine.
  • Such pivoting from bottom to top gives access to the interior of the nacelle, which allows maintenance of the turbojet engine.
  • the covers are closed and have a shape such that they ensure the aerodynamic continuity of the nacelle as a whole.
  • the lower edge of said hood is provided with a locking system to maintain the hood in the closed position at the end of the maintenance session and especially during a flight.
  • a locking mechanism is necessary to prevent unintentional opening of the hood or hoods during a flight. Indeed, when the aircraft is in flight several factors, such as the aerodynamic flow on the covers, any overpressure caused by the bursting of pipes internal to the engine or the presence of devices ventilation, exert forces on the hoods tending to open them. When a cover extends in open position in full flight, it is easily torn off the platform. This can occur when runway personnel have forgotten to close one or more of the locking system locks. The turbojet engine is no longer protected and the hood crushes on the ground, in an uncontrollable manner.
  • the current opening hoods are not entirely satisfactory to the extent that, due to human error, said hoods can open and / or be torn from the nacelle.
  • it seeks to solve the problem cited above by providing a nacelle hood adapted to have a closed position and an open position, and which is not likely to open unexpectedly when an aircraft equipped with said nacelle is in flight.
  • the invention proposes to provide a turbojet engine nacelle with at least one removable cover, formed of two independent parts able to slide relative to one another so as to clear access to the interior of the nacelle. . More specifically, a first part of the hood is fixed relative to the remainder of the nacelle and to the turbojet, while the second part is able to be translated along the first part to clear access to an opening. Depending on the needs, it is possible to provide several degrees of opening of the cover, the moving part being more or less superimposed on the fixed part. The more the mobile part is superimposed on the fixed part, the larger the open opening, and vice versa.
  • the fixed part and the mobile part of the cover according to the invention are formed in the height of said cover.
  • height means the dimension of the hood extending vertically relative to the axis of the turbojet engine.
  • Length means the dimension of the cover extending parallel to the axis of the turbojet engine.
  • Lower part, or lower part generally means the part of the element considered below the axis of the turbojet engine housed in the nacelle.
  • Upper part, or upper part generally means that part of the element considered above the axis of the turbojet engine housed in the nacelle.
  • the movable part can slide, relative to the fixed part, in the manner of a shutter.
  • the mobile part slides inside the nacelle, which makes it possible not to create aerodynamic drag, or very little.
  • the sliding means are formed on an inner part of the nacelle hood, and therefore do not disturb the aerodynamic flow outside the nacelle.
  • the invention also provides a locking system for maintaining the hood according to the invention on the one hand in the closed position when the aircraft is in flight, and on the other hand in the open position when a maintenance of the nacelle must be performed.
  • a bivalent system allows a gain of space and mass in the nacelle.
  • the invention therefore relates to a nacelle hood for a turbojet, characterized in that it is provided with a fixed part and a movable part extending one above the other, the mobile part being capable of sliding along the fixed part, from a closed position in which the movable part extends in the extension of the fixed part, to an open position in which the mobile part is at least partially superimposed on the fixed part .
  • the fixed part is located in the upper part of the cover, the movable part being located in the lower part of said cover;
  • the movable portion comprises engaging means adapted to engage in sliding guide rails, said guide rails being fixedly mounted in the nacelle;
  • the movable portion is provided with at least one upper handle located in the upper part of the movable part and at least one lower handle located in the lower part of the movable part;
  • At least one upper and / or lower handle is retractable
  • the cover comprises a locking device adapted to lock the movable part of the cover in the closed position and / or open;
  • the locking device comprises pins, located on an inner face of the movable portion of the cover, said pins being intended to be inserted into openings formed on fixed amounts of the nacelle;
  • the locking device is actuated by at least one handle located on the movable part of the cover.
  • the invention also relates to a nacelle provided with at least one hood according to the invention.
  • the two covers of the nacelle conform to the hood of the invention.
  • FIG. 1 a schematic representation of a nacelle provided with a hood according to the invention
  • FIG. 2A, 2B and 2C schematic representations of a hood according to the invention at different stages of closing and opening;
  • FIG. 3 a schematic representation of an exemplary locking system of a nacelle hood according to the invention.
  • FIG 1 a nacelle 1 attached to a wing 2 by a fixing pole 3.
  • the nacelle 1 comprises a fan casing 4 and two covers 5 (a single cover visible in Figure 1) forming respectively the left cover and the right hood of basket 1.
  • Each hood 5 has a general shape in a semicircle.
  • the cover 5 shown in Figure 1 is in the closed position. More specifically, a fixed upper portion 6 and a lower movable portion 7 of the cover 5 extend one above the other, so as to follow the contour in a circular arc, or semicircle, of the nacelle 1.
  • the outer surface of the bonnet 5 follows an aerodynamic profile of the nacelle 1 as a whole.
  • An upper edge 8 of the fixed part 6 is secured to the fixing pylon 3.
  • the upper edge 8 of the fixed part 6 is screwed to the fixing pylon 3.
  • the fixed part 6 of the cover 5 is stationary relative to the rest of the nacelle 1.
  • the lower mobile part 7 is not attached to any fixed part of the nacelle 1 or the attachment mat 3.
  • the movable portion 7 of the cover 5 is provided with a lower handle 9 and an upper handle 10, which facilitate the handling of the movable portion 7 of the cover, to move it from the closed position as shown in FIG. Figure 1, in an open position and vice versa.
  • the lower handle 9 is directed towards the ground, while the upper handle 10 is directed towards the fixed part 6 of the cover 5.
  • one of the two handles 9, 10, or both are retractable.
  • the mobile part 7 of the cover 5 slides under the fixed part 6, towards the inside of the nacelle 1
  • the presence of the handles does not interfere with the sliding.
  • internally or internally is meant directed towards the inside of the nacelle, and external or external, directed towards the outside of the nacelle.
  • the retractable handles 9 and 10 do not form protuberances on the outer surface of the movable part 7 of the cover 5, which could disturb the flow of air outside of the nacelle 1.
  • FIGS. 2A, 2B and 2C show a partial cross-section of the nacelle 1 at a hood 5 of the invention, respectively in the closed position (FIG. 2A), in the partially open position (FIG. 2B) and in FIG. open position ( Figure 2C).
  • the mobile part 7 of the cover 5 When it is desired to have access to the internal volume of the nacelle, the mobile part 7 of the cover 5 is slid along the fixed part 6. In the example shown in FIGS. 2B and 2C, the mobile part 7 of the sliding cover 5 along an inner wall 12 of the fixed part 6 of said cover 5.
  • the movable portion 7 of the cover 5 is disposed between the fixed part 6 of the cover 5 and the turbojet engine housed in the nacelle 1, when the cover 5 is in the open position, as shown in Figure 2C.
  • the movable portion 7 and the fixed portion 6 of the cover 5 are superimposed. It is then possible to have access to the lower part of the turbojet, where is all the machinery requiring maintenance.
  • the mobile part 7 of the cover 5 When it is desired to open the cover 5 of the platform 1, and insofar as the mobile part 7 of the cover 5 is provided with a lower handle 9 and an upper handle 10, it is possible to open the opening the cover 5 by pushing the movable part 7 of said cover 5 upwards, by means of the upper handle 10, then continue to push the movable part 7 along the fixed part 6 by means of the handle 9 when the handle 10 is no longer accessible.
  • the upper handle 10 is no longer accessible when the portion of the movable part 7 carrying the upper handle 10 passes below the fixed part 6.
  • the upper handle 10 In the case where the mobile part 7 of the cover 5 slides above the fixed part 6, the upper handle 10 is no longer accessible when it is located too high for the user responsible for the maintenance of the turbojet engine.
  • the closing phase of the cover 5 can be done initially by means of the lower handle 9, then by means of the upper handle 10 when it becomes available again to users, so that it is easier to pull the movable part 7 of the cover 5 down.
  • the mobile part 7 of the cover 5 slides along the internal face 12 of the fixed part 6 of the cover 5 via two guide rails 11 of the sliding.
  • the guide rails 11 are fixedly mounted inside the nacelle.
  • the low and high ends of the front guide rail are secured to the housing cover, while the low and high ends of the rear guide rail are secured to the thrust reverser cover.
  • front and rear means in relation to the direction of travel of an aircraft equipped with such a platform 1.
  • the trajectory of the guide rails January 1 follows the circular arc contour of the movable parts 6 and fixed 7 hood 5.
  • the guide rails 11 are adapted to the desired trajectory for the mobile part 7 of the cover 5.
  • the movable part 7 of the cover 5 is provided on an inner face 13 intended to come opposite the guide rails 11, two rows of engagement means 14 (a single row visible in FIGS. 2A, 2B and FIG. 2C) adapted to engage the guide rails 11, so as to guide the sliding of the movable portion 7 of the cover 5 along the fixed portion 6 of said cover 5.
  • the engagement means 14 are rollers arranged in pairs, on either side of the guide rails 11.
  • Each guide rail January 1 coincides with at least two pairs of rollers 14 on the inner face 13 of the movable portion 7 of said cover 5.
  • each guide rail 11 coincides with two engagement means 14, situated respectively at the top and bottom of the movable portion 7 of the cover 5.
  • the inner face 13 of the movable portion 7 of the cover 5 of three, four or more 14 rail engagement means 1 1 to ensure a good guiding of the sliding of the mobile part 7 along the fixed part 6 of the cover 5.
  • the sliding can be obtained by means of grooves in which are engaged longilinear protuberances said grooves and protuberances being arranged so as to coincide.
  • the inner face 13 of the movable portion 7 of the cover 5 is provided with a locking device to maintain, as necessary, said movable portion 7 in the low or high position and therefore in the closed position and / or in the open position 5.
  • the locking device may comprise a system linkage 17 as shown in Figure 3.
  • the locking device according to the invention further comprises small orifices provided on fixed front and rear uprights of the nacelle (not shown), said orifices being adapted to receive pimples 19
  • the orifices may be formed on the guide rails 1 1 along which the movable portion 7 of the cover 5 slides.
  • the linkage system 17 comprises a rod 20, disposed in the thickness of the movable portion 7 of the cover 5, and slightly curved so as to fit the circular arcuate contour of said movable part 7.
  • the rod 20 extends into the height H of the movable portion 7 of the cover 5.
  • the rod 20 is provided with several pairs of rods 21 (only three are shown in Figure 4) spaced regularly along said rod 20. Each rod 21 is connected to the place of a free end opposite the end connected to the rod 20, a pin 19 blocking. Each pair of rods has a connecting rod 21 before and a connecting rod 21 back.
  • the linkage system 17 allows to engage the pins 19 before, secured to the connecting rods 21 before, in orifices provided on the guide rail 11 before, and the rear pins 19, integral with the rods 21 rear, in similar orifices provided on the rear guide rail 11.
  • the rod 20 is located in the middle of the movable portion 7 of the cover 5, so that the pins 19 must be of sufficient length to reach the rails 11 on which the orifices are formed.
  • the guide rails 11 may coincide with the outer edges of the movable portion 7 of the cover 5, the pins 19 then each to extend over a half width of said movable portion 7 to reach the guide rails 11 front and rear and therefore the orifices.
  • the locking device according to the invention makes it possible to maintain the mobile part 7 of the cover 5 in the lower part of said cover 5, by means of the pins 19 inserted in the orifices located in the lower part of the guide rails 11 .
  • the locking device according to the invention makes it possible to keep the mobile part 7 of the cover 5 in the high position by means of the same 19 inserted in orifices located in the upper part of the guide rails 11.
  • the linkage system 17 of the invention is actuated via at least one of the two handles 9, 10 located on the movable portion 7 of the cover 5.
  • the handles 9 and 10 are used to lock and unlock the linkage system 17.
  • the rods 21 are retracted and extend in the extension of the rod 20, so that the pins 19 are erased so as not to impede the sliding of the movable portion 7 of the cover 5 along the fixed portion 6.
  • the connecting rods 21 extend substantially perpendicular to the rod 20, the pins 19 are then deployed axially, one forward, the other rearwardly, so as to be inserted into the corresponding orifices formed in the front and rear guide 11.
  • the upper handle 10 is rotated by a quarter of a turn so as to extend to again the connecting rods 21 and the pins 19 of the linkage system 20.
  • the dimensions of the movable portion 7 of the cover 5 are substantially equal to the dimensions of the fixed portion 6 of said cover 5. It is also possible to provide a movable portion 7 whose dimensions are strictly lower. to the dimensions of the fixed portion 6 of the cover 5. For example, the movable portion 7 of the cover 5 has a height strictly less than the height of the fixed portion 6. Similarly, it is possible that the length of the movable portion 7 of the cover 5 is less than the length of the fixed part 6.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Wind Motors (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Superstructure Of Vehicle (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Meat, Egg Or Seafood Products (AREA)

Abstract

The invention concerns a nacelle cowling (5) for turbojet, characterized in that it is provided with a fixed part (6) and a mobile part (7), the mobile part being adapted to slide along the fixed part, from a closed position wherein the mobile part extends in the extension of the fixed part, up to an open position wherein the mobile part is at least partly superimposed to the fixed part. For example, the fixed part is located in the upper part of the cowling, the mobile part being located in the lower part of said cowling.

Description

Capot de nacelle pour turboréacteur et nacelle comportant au moins un tel capot. Nacelle hood for turbojet and nacelle comprising at least one such hood.
L'invention concerne un capot de nacelle pour turboréacteur d'aéronef. Plus précisément l'invention concerne un capot de nacelle apte à avoir au moins une position fermée, dans laquelle le capot recouvre complètement un turboréacteur logé dans la nacelle, et une position ouverte, dans laquelle le capot est éloigné du turboréacteur, de manière à permettre un accès audit turboréacteur. La nacelle d'un turboréacteur pour aéronef comporte généralement deux capots, respectivement capot droit et capot gauche placés de part et d'autre de la soufflante du turboréacteur. Chaque capot a une section en arc de cercle selon un plan transversal de la nacelle, suivant un contour externe semi-circulaire d'un flanc droit et d'un flanc gauche du turboréacteur. Généralement, au moins un des deux capots de la nacelle peut être ouvert de manière à permettre un accès à différents équipements et systèmes logés à l'intérieur de la nacelle. Pour cela, le bord supérieur du capot est articulé sur la partie supérieure du turboréacteur. Par exemple, le bord supérieur du capot est monté en rotation sur la partie supérieure du turboréacteur de manière à autoriser le pivotement dudit capot depuis une position basse dans laquelle il épouse le contour externe d'un flanc du turboréacteur, jusqu'à une position haute dans laquelle il est surélevé par rapport au turboréacteur. Un tel pivotement du bas vers le haut dégage un accès à l'intérieur de la nacelle, qui permet la maintenance du turboréacteur. Lorsque l'avion est en vol, les capots sont fermés et présentent une forme telle qu'ils assurent la continuité aérodynamique de la nacelle dans son ensemble.The invention relates to a nacelle hood for an aircraft turbojet engine. More specifically, the invention relates to a nacelle hood adapted to have at least one closed position, in which the hood completely covers a turbojet engine housed in the nacelle, and an open position, in which the hood is remote from the turbojet, so as to allow an access to said turbojet engine. The nacelle of an aircraft turbojet engine generally comprises two covers, respectively right cover and left cover placed on either side of the turbojet fan. Each bonnet has a section in an arc in a transverse plane of the nacelle, following a semicircular outer contour of a right flank and a left flank of the turbojet engine. Generally, at least one of the two covers of the nacelle can be opened to allow access to various equipment and systems housed inside the nacelle. For this, the upper edge of the hood is articulated on the upper part of the turbojet engine. For example, the upper edge of the hood is rotatably mounted on the upper part of the turbojet so as to allow the pivoting of said cowl from a low position in which it follows the outer contour of a side of the turbojet, to a high position. in which it is raised relative to the turbojet engine. Such pivoting from bottom to top gives access to the interior of the nacelle, which allows maintenance of the turbojet engine. When the aircraft is in flight, the covers are closed and have a shape such that they ensure the aerodynamic continuity of the nacelle as a whole.
Afin de garantir la fermeture du capot, le bord inférieur dudit capot est muni d'un système de verrouillage permettant de maintenir le capot en position fermée à la fin de la séance de maintenance et plus particulièrement lors d'un vol. Un tel mécanisme de verrouillage est nécessaire pour éviter l'ouverture intempestive du ou des capots lors d'un vol. En effet, lorsque l'aéronef est en vol plusieurs facteurs, tels que l'écoulement aérodynamique sur les capots, les surpressions éventuelles provoquées par l'éclatement de tuyauteries internes au moteur ou encore la présence de dispositifs de ventilation, exercent des forces sur les capots tendant à les ouvrir. Lorsqu'un capot s'étend en position ouverte en plein vol, il est aisément arraché de la nacelle. Cela peut notamment survenir lorsque le personnel de piste a oublié de fermer un ou plusieurs des verrous du système de verrouillage. Le turboréacteur n'est plus protégé et le capot s'écrase au sol, de manière non contrôlable.To ensure the closure of the hood, the lower edge of said hood is provided with a locking system to maintain the hood in the closed position at the end of the maintenance session and especially during a flight. Such a locking mechanism is necessary to prevent unintentional opening of the hood or hoods during a flight. Indeed, when the aircraft is in flight several factors, such as the aerodynamic flow on the covers, any overpressure caused by the bursting of pipes internal to the engine or the presence of devices ventilation, exert forces on the hoods tending to open them. When a cover extends in open position in full flight, it is easily torn off the platform. This can occur when runway personnel have forgotten to close one or more of the locking system locks. The turbojet engine is no longer protected and the hood crushes on the ground, in an uncontrollable manner.
Aussi, les capots ouvrants actuels ne donnent pas entière satisfaction dans la mesure où, du fait d'une erreur humaine, lesdits capots peuvent s'ouvrir et/ou être arrachés de la nacelle. Dans l'invention, on cherche à résoudre le problème cité ci-dessus en proposant un capot de nacelle apte à avoir une position fermée et une position ouverte, et qui ne risque pas de s'ouvrir de manière intempestive lorsqu'un aéronef muni de ladite nacelle est en vol.Also, the current opening hoods are not entirely satisfactory to the extent that, due to human error, said hoods can open and / or be torn from the nacelle. In the invention, it seeks to solve the problem cited above by providing a nacelle hood adapted to have a closed position and an open position, and which is not likely to open unexpectedly when an aircraft equipped with said nacelle is in flight.
Pour cela l'invention propose de munir une nacelle de turboréacteur d'au moins un capot amovible, formé de deux parties indépendantes aptes à coulisser l'une par rapport à l'autre de manière à dégager un accès à l'intérieur de la nacelle. Plus précisément une première partie du capot est fixe par rapport au reste de la nacelle et au turboréacteur, tandis que la deuxième partie est apte à être translatée le long de la première partie pour dégager un accès à une ouverture. Selon les besoins, il est possible de prévoir plusieurs degrés d'ouverture du capot, la partie mobile étant plus ou moins superposée à la partie fixe. Plus la partie mobile est superposée à la partie fixe, plus l'ouverture dégagée est grande, et inversement.For this, the invention proposes to provide a turbojet engine nacelle with at least one removable cover, formed of two independent parts able to slide relative to one another so as to clear access to the interior of the nacelle. . More specifically, a first part of the hood is fixed relative to the remainder of the nacelle and to the turbojet, while the second part is able to be translated along the first part to clear access to an opening. Depending on the needs, it is possible to provide several degrees of opening of the cover, the moving part being more or less superimposed on the fixed part. The more the mobile part is superimposed on the fixed part, the larger the open opening, and vice versa.
Préférentiellement, la partie fixe et la partie mobile du capot selon l'invention sont ménagées dans la hauteur dudit capot. Par hauteur, on entend la dimension du capot s'étendant verticalement par rapport à l'axe du turboréacteur. Ainsi, lors d'un vol, la poussée exercée sur la nacelle du turboréacteur par un flux d'air externe ne risque pas d'ouvrir de manière accidentelle le ou les capots amovibles de ladite nacelle, ce qui pourrait avoir lieu si les parties fixe et mobile du capot s'étendaient dans la longueur dudit capot. Par longueur, on entend la dimension du capot s'étendant parallèlement à l'axe du turboréacteur.Preferably, the fixed part and the mobile part of the cover according to the invention are formed in the height of said cover. By height means the dimension of the hood extending vertically relative to the axis of the turbojet engine. Thus, during a flight, the thrust exerted on the nacelle of the turbojet engine by an external air flow is not likely to accidentally open the removable hood or covers of said nacelle, which could take place if the fixed parts and mobile hood extended in the length of said hood. Length means the dimension of the cover extending parallel to the axis of the turbojet engine.
Dans la mesure où la plupart du temps les divers systèmes et accessoires auxquels il faut avoir accès dans le turboréacteur sont situés en partie basse du turboréacteur, il peut être intéressant de ménager la partie mobile du capot au niveau de la partie inférieure de la nacelle et la partie fixe au niveau de la partie supérieure. Par partie inférieure, ou partie basse, on entend d'une manière générale la partie de l'élément considéré située au- dessous de l'axe du turboréacteur logé dans la nacelle. Par partie supérieure, ou partie haute on entend d'une manière générale la partie de l'élément considéré située au-dessus de l'axe du turboréacteur logé dans la nacelle.Since most of the various systems and accessories that must be accessed in the turbojet engine are located in the lower part of the turbojet engine, it may be advantageous to spare the part mobile cover at the bottom of the nacelle and the fixed part at the top. Lower part, or lower part, generally means the part of the element considered below the axis of the turbojet engine housed in the nacelle. Upper part, or upper part generally means that part of the element considered above the axis of the turbojet engine housed in the nacelle.
La partie mobile peut coulisser, par rapport à la partie fixe, à la manière d'un volet roulant. Par exemple, la partie mobile coulisse à l'intérieur de la nacelle, ce qui permet de ne pas créer de traînée aérodynamique, ou très peu. En effet, les moyens de coulissement sont ménagés sur une partie interne du capot de nacelle, et donc ne perturbent pas l'écoulement aérodynamique à l'extérieur de la nacelle.The movable part can slide, relative to the fixed part, in the manner of a shutter. For example, the mobile part slides inside the nacelle, which makes it possible not to create aerodynamic drag, or very little. Indeed, the sliding means are formed on an inner part of the nacelle hood, and therefore do not disturb the aerodynamic flow outside the nacelle.
Afin de faciliter l'ouverture et la fermeture du capot selon l'invention, il est possible de prévoir une ou plusieurs poignées, disposées sur la face externe de la partie mobile du capot, et permettant de prendre en main ladite partie mobile et de la soulever ou de l'abaisser aisément.In order to facilitate the opening and closing of the hood according to the invention, it is possible to provide one or more handles, arranged on the outer face of the mobile part of the hood, and to take hold of said mobile part and the lift or lower it easily.
L'invention prévoit également un système de verrouillage permettant de maintenir le capot selon l'invention d'une part en position fermée lorsque l'aéronef est en vol, et d'autre part en position ouverte lorsqu'une maintenance de la nacelle doit être effectuée. Ainsi, on évite au capot de la nacelle de se refermer de manière intempestive en coulissant vers la position fermée alors que quelqu'un est en train de pratiquer une maintenance. Par ailleurs, un tel système bivalent permet un gain de place et de masse dans la nacelle. Par bivalent, on entend apte à remplir deux fonctions différentes et indépendantes.The invention also provides a locking system for maintaining the hood according to the invention on the one hand in the closed position when the aircraft is in flight, and on the other hand in the open position when a maintenance of the nacelle must be performed. Thus, it avoids the hood of the nacelle to close inadvertently sliding to the closed position while someone is performing maintenance. Moreover, such a bivalent system allows a gain of space and mass in the nacelle. By bivalent, we mean able to fulfill two different and independent functions.
L'invention a donc pour objet un capot de nacelle pour turboréacteur, caractérisé en ce qu'il est muni d'une partie fixe et d'une partie mobile s'étendant l'une au dessus de l'autre, la partie mobile étant apte à coulisser le long de la partie fixe, depuis une position fermée dans laquelle la partie mobile s'étend dans le prolongement de la partie fixe, jusqu'à une position ouverte dans laquelle la partie mobile est au moins partiellement superposée à la partie fixe.The invention therefore relates to a nacelle hood for a turbojet, characterized in that it is provided with a fixed part and a movable part extending one above the other, the mobile part being capable of sliding along the fixed part, from a closed position in which the movable part extends in the extension of the fixed part, to an open position in which the mobile part is at least partially superimposed on the fixed part .
Selon des exemples de réalisation du capot de nacelle selon l'invention, il est possible d'ajouter tout ou partie des caractéristiques supplémentaires suivantes :According to embodiments of the nacelle hood according to the invention, it is possible to add all or part of the characteristics following additional
- la partie fixe est située en partie supérieure du capot, la partie mobile étant située en partie inférieure dudit capot ;- The fixed part is located in the upper part of the cover, the movable part being located in the lower part of said cover;
- la partie mobile comporte des moyens d'engagement aptes à s'engager dans des rails de guidage du coulissement, lesdits rails de guidage étant montés fixes dans la nacelle ;- The movable portion comprises engaging means adapted to engage in sliding guide rails, said guide rails being fixedly mounted in the nacelle;
- la partie mobile du capot coulisse le long d'une face interne de la partie fixe dudit capot ;the mobile part of the cover slides along an internal face of the fixed part of said cover;
- la partie mobile est munie d'au moins une poignée supérieure située en partie supérieure de la partie mobile et d'au moins une poignée inférieure située en partie inférieure de la partie mobile ;- The movable portion is provided with at least one upper handle located in the upper part of the movable part and at least one lower handle located in the lower part of the movable part;
- au moins une poignée supérieure et/ou inférieure est escamotable ;at least one upper and / or lower handle is retractable;
- le capot comporte un dispositif de verrouillage apte à verrouiller la partie mobile du capot en position fermée et/ou ouverte ; - le dispositif de verrouillage comporte des picots, situés sur une face interne de la partie mobile du capot, lesdits picots étant destinés à être insérés dans des orifices ménagés sur des montants fixes de la nacelle ;- The cover comprises a locking device adapted to lock the movable part of the cover in the closed position and / or open; - The locking device comprises pins, located on an inner face of the movable portion of the cover, said pins being intended to be inserted into openings formed on fixed amounts of the nacelle;
- le dispositif de verrouillage est actionné par au moins une poignée située sur la partie mobile du capot. L'invention concerne également une nacelle munie d'au moins un capot selon l'invention. Préférentiellement les deux capots de la nacelle sont conformes au capot de l'invention.- The locking device is actuated by at least one handle located on the movable part of the cover. The invention also relates to a nacelle provided with at least one hood according to the invention. Preferably, the two covers of the nacelle conform to the hood of the invention.
L'invention sera mieux comprise à la lecture de la description qui suit et à l'examen des figures qui l'accompagnent. Celles-ci sont présentées à titre indicatif et nullement limitatif de l'invention. Les figures représentent :The invention will be better understood on reading the description which follows and on examining the figures which accompany it. These are presented as an indication and in no way limitative of the invention. The figures represent:
- Figure 1 : une représentation schématique d'une nacelle munie d'un capot selon l'invention ;- Figure 1: a schematic representation of a nacelle provided with a hood according to the invention;
- Figure 2A,2B et 2C : des représentations schématiques d'un capot selon l'invention à différents stades de fermeture et d'ouverture ; - Figure 3 : une représentation schématique d'un exemple de système de verrouillage d'un capot de nacelle selon l'invention.- Figure 2A, 2B and 2C: schematic representations of a hood according to the invention at different stages of closing and opening; - Figure 3: a schematic representation of an exemplary locking system of a nacelle hood according to the invention.
Sur la figure 1 est représentée une nacelle 1 fixée à une voilure 2 par un mât de fixation 3. La nacelle 1 comporte un carter de soufflante 4 ainsi que deux capots 5 (un seul capot visible sur la figure 1) formant respectivement le capot gauche et le capot droit de la nacelle 1. Chaque capot 5 a une forme générale en demi-cercle.In Figure 1 is shown a nacelle 1 attached to a wing 2 by a fixing pole 3. The nacelle 1 comprises a fan casing 4 and two covers 5 (a single cover visible in Figure 1) forming respectively the left cover and the right hood of basket 1. Each hood 5 has a general shape in a semicircle.
Le capot 5 représenté à la figure 1 est en position fermée. Plus précisément, une partie fixe 6 supérieure et une partie mobile 7 inférieure du capot 5 s'étendent l'une au-dessus de l'autre, de manière à suivre le contour en arc de cercle, ou demi-cercle, de la nacelle 1. La surface externe du capot 5 suit un profil aérodynamique de la nacelle 1 dans son ensemble. Un bord supérieur 8 de la partie fixe 6 est solidarisé au mât de fixation 3. Par exemple, le bord supérieur 8 de la partie fixe 6 est vissé au mât de fixation 3. Ainsi la partie fixe 6 du capot 5 est immobile par rapport au reste de la nacelle 1. A l'inverse, la partie mobile 7 inférieure n'est solidarisée à aucune partie fixe de la nacelle 1 ou du mat de fixation 3.The cover 5 shown in Figure 1 is in the closed position. More specifically, a fixed upper portion 6 and a lower movable portion 7 of the cover 5 extend one above the other, so as to follow the contour in a circular arc, or semicircle, of the nacelle 1. The outer surface of the bonnet 5 follows an aerodynamic profile of the nacelle 1 as a whole. An upper edge 8 of the fixed part 6 is secured to the fixing pylon 3. For example, the upper edge 8 of the fixed part 6 is screwed to the fixing pylon 3. Thus the fixed part 6 of the cover 5 is stationary relative to the rest of the nacelle 1. Conversely, the lower mobile part 7 is not attached to any fixed part of the nacelle 1 or the attachment mat 3.
La partie mobile 7 du capot 5 est munie d'une poignée inférieure 9 et d'une poignée supérieure 10, qui facilitent la prise en main de la partie mobile 7 du capot, afin de la faire passer de la position fermée telle que représentée à la figure 1 , à une position ouverte et inversement. La poignée inférieure 9 est dirigée vers le sol, tandis que la poignée supérieure 10 est dirigée vers la partie fixe 6 du capot 5.The movable portion 7 of the cover 5 is provided with a lower handle 9 and an upper handle 10, which facilitate the handling of the movable portion 7 of the cover, to move it from the closed position as shown in FIG. Figure 1, in an open position and vice versa. The lower handle 9 is directed towards the ground, while the upper handle 10 is directed towards the fixed part 6 of the cover 5.
Il est possible de prévoir qu'une des deux poignées 9, 10, ou les deux, soient escamotables. Ainsi, dans le cas où la partie mobile 7 du capot 5 coulisse sous la partie fixe 6, vers l'intérieur de la nacelle 1 , la présence des poignées ne gène pas le coulissement. D'une manière générale, par interne ou intérieur, on entend dirigé vers l'intérieur de la nacelle, et par externe ou extérieur, dirigé vers l'extérieur de la nacelle. De plus, en vol, les poignées 9 et 10 escamotables ne forment pas de protubérances sur la surface externe de la partie mobile 7 du capot 5, qui pourraient perturber l'écoulement de l'air à l'extérieur de la nacelle 1.It is possible to provide that one of the two handles 9, 10, or both, are retractable. Thus, in the case where the mobile part 7 of the cover 5 slides under the fixed part 6, towards the inside of the nacelle 1, the presence of the handles does not interfere with the sliding. In general, internally or internally, is meant directed towards the inside of the nacelle, and external or external, directed towards the outside of the nacelle. In addition, in flight, the retractable handles 9 and 10 do not form protuberances on the outer surface of the movable part 7 of the cover 5, which could disturb the flow of air outside of the nacelle 1.
Sur les figures 2A, 2B et 2C, est représentée une coupe transversale partielle de la nacelle 1 au niveau d'un capot 5 de l'invention, respectivement en position fermée (figure 2A), en position partiellement ouverte (figure 2B) et en position ouverte (figure 2C).FIGS. 2A, 2B and 2C show a partial cross-section of the nacelle 1 at a hood 5 of the invention, respectively in the closed position (FIG. 2A), in the partially open position (FIG. 2B) and in FIG. open position (Figure 2C).
Le capot 5, en forme de demi-cercle, suit un contour externe d'un turboréacteur (non représenté) situé à l'intérieur de la nacelle 1. Plus précisément, la partie fixe 6 et la partie mobile 7 du capot 5, en forme d'arc de cercle, suivent respectivement le contour externe d'un portion supérieure et d'une portion inférieure d'un flanc du turboréacteur. En position fermée, telle que représentée sur la figure 2A, la partie mobile 7 inférieure du capot 5, s'étend dans le prolongement inférieur de la partie fixe 6 supérieure du capot 5. La partie fixe 6 et la partie mobile 7 du capot 5 sont ménagées dans la hauteur H dudit capot 5, l'une en dessous de l'autre.The cap 5, in the form of a semicircle, follows an outer contour of a turbojet engine (not shown) located inside the nacelle 1. More precisely, the fixed part 6 and the mobile part 7 of the cover 5, in arcuate shape, respectively follow the outer contour of an upper portion and a lower portion of a side of the turbojet. In the closed position, as shown in FIG. 2A, the lower mobile part 7 of the cover 5 extends in the lower extension of the fixed upper part 6 of the cover 5. The fixed part 6 and the mobile part 7 of the cover 5 are provided in the height H of said cover 5, one below the other.
Lorsqu'on désire avoir accès au volume interne de la nacelle, on fait coulisser la partie mobile 7 du capot 5 le long de la partie fixe 6. Dans l'exemple représenté aux figures 2B et 2C, la partie mobile 7 du capot 5 coulisse le long d'une paroi interne 12 de la partie fixe 6 dudit capot 5. Ainsi, la partie mobile 7 du capot 5 est disposée entre la partie fixe 6 du capot 5 et le turboréacteur logé dans la nacelle 1 , lorsque le capot 5 est en position ouverte, comme cela est représenté sur la figure 2C. La partie mobile 7 et la partie fixe 6 du capot 5 sont donc superposées. Il est alors possible d'avoir accès à la partie basse du turboréacteur, où se trouve l'ensemble de la machinerie nécessitant une maintenance.When it is desired to have access to the internal volume of the nacelle, the mobile part 7 of the cover 5 is slid along the fixed part 6. In the example shown in FIGS. 2B and 2C, the mobile part 7 of the sliding cover 5 along an inner wall 12 of the fixed part 6 of said cover 5. Thus, the movable portion 7 of the cover 5 is disposed between the fixed part 6 of the cover 5 and the turbojet engine housed in the nacelle 1, when the cover 5 is in the open position, as shown in Figure 2C. The movable portion 7 and the fixed portion 6 of the cover 5 are superimposed. It is then possible to have access to the lower part of the turbojet, where is all the machinery requiring maintenance.
Lorsqu'on souhaite ouvrir le capot 5 de la nacelle 1 , et dans la mesure où la partie mobile 7 du capot 5 est munie d'une poignée inférieure 9 et d'une poignée supérieure 10, il est possible d'entamer l'ouverture du capot 5 en poussant la partie mobile 7 dudit capot 5 vers le haut, au moyen de la poignée supérieure 10, puis de continuer à pousser la partie mobile 7 le long de la partie fixe 6 au moyen de la poignée 9 lorsque la poignée 10 n'est plus accessible. Dans le cas où la partie mobile 7 du capot 5 coulisse sous la partie fixe 6, la poignée supérieure 10 n'est plus accessible lorsque la portion de la partie mobile 7 portant cette poignée supérieure 10 passe en dessous de la partie fixe 6. Dans le cas où la partie mobile 7 du capot 5 coulisse au- dessus de la partie fixe 6, la poignée supérieure 10 n'est plus accessible lorsqu'elle est située trop haut pour l'utilisateur chargé de la maintenance du turboréacteur.When it is desired to open the cover 5 of the platform 1, and insofar as the mobile part 7 of the cover 5 is provided with a lower handle 9 and an upper handle 10, it is possible to open the opening the cover 5 by pushing the movable part 7 of said cover 5 upwards, by means of the upper handle 10, then continue to push the movable part 7 along the fixed part 6 by means of the handle 9 when the handle 10 is no longer accessible. In the case where the mobile part 7 of the cover 5 slides under the fixed part 6, the upper handle 10 is no longer accessible when the portion of the movable part 7 carrying the upper handle 10 passes below the fixed part 6. In the case where the mobile part 7 of the cover 5 slides above the fixed part 6, the upper handle 10 is no longer accessible when it is located too high for the user responsible for the maintenance of the turbojet engine.
Lorsque la maintenance est terminée, il suffit de tirer la partie mobile 7 du capot 5 vers le bas, par l'intermédiaire de la poignée inférieure 9, jusqu'à la position capot fermé telle que représentée à la figure 2A. Bien entendu, la phase de fermeture du capot 5 peut se faire dans un premier temps au moyen de la poignée inférieure 9, puis au moyen de la poignée supérieure 10 lorsqu'elle devient à nouveau accessible aux utilisateurs, et ce afin qu'il soit plus aisé de tirer la partie mobile 7 du capot 5 vers le bas. Dans un exemple particulier de réalisation, et tel que cela est représenté sur les figures 2A, 2B et 2C, la partie mobile 7 du capot 5 coulisse le long de la face interne 12 de la partie fixe 6 du capot 5 par l'intermédiaire de deux rails de guidage 11 du coulissement. Les rails de guidage 11 sont montés fixes à l'intérieur de la nacelle. Par exemple, les extrémités basse et haute du rail de guidage avant sont solidarisées au capot de carter, tandis que les extrémités basse et haute du rail de guidage arrière sont solidarisées au capot d'inverseur de poussée. Par avant et arrière, on entend par rapport au sens d'avancement d'un aéronef muni d'une telle nacelle 1. La trajectoire des rails de guidage 1 1 suit le contour en arc de cercle des parties mobile 6 et fixe 7 du capot 5. Ainsi les rails de guidage 11 sont adaptés à la trajectoire souhaitée pour la partie mobile 7 du capot 5.When maintenance is complete, it is sufficient to pull the movable portion 7 of the cover 5 downwards, through the lower handle 9, to the closed position hood as shown in Figure 2A. Of course, the closing phase of the cover 5 can be done initially by means of the lower handle 9, then by means of the upper handle 10 when it becomes available again to users, so that it is easier to pull the movable part 7 of the cover 5 down. In a particular embodiment, and as shown in FIGS. 2A, 2B and 2C, the mobile part 7 of the cover 5 slides along the internal face 12 of the fixed part 6 of the cover 5 via two guide rails 11 of the sliding. The guide rails 11 are fixedly mounted inside the nacelle. For example, the low and high ends of the front guide rail are secured to the housing cover, while the low and high ends of the rear guide rail are secured to the thrust reverser cover. By front and rear means in relation to the direction of travel of an aircraft equipped with such a platform 1. The trajectory of the guide rails January 1 follows the circular arc contour of the movable parts 6 and fixed 7 hood 5. Thus the guide rails 11 are adapted to the desired trajectory for the mobile part 7 of the cover 5.
La partie mobile 7 du capot 5 est munie sur une face interne 13 destinée à venir en vis-à-vis des rails de guidage 11 , de deux rangées de moyens d'engagement 14 (une seule rangée visible sur les figures 2A, 2B et 2C) aptes à s'engager dans les rails de guidage 11 , de manière à guider le coulissement de la partie mobile 7 du capot 5 le long de la partie fixe 6 dudit capot 5. Par exemple, les moyens d'engagement 14 sont des galets disposés par paires, de part et d'autre des rails de guidage 11. Chaque rail de guidage 1 1 coïncide avec au moins deux paires de galets 14 sur la face interne 13 de la partie mobile 7 dudit capot 5. Dans l'exemple représenté, chaque rail de guidage 11 coïncide avec deux moyens d'engagement 14, situés respectivement en parte haute et basse de la partie mobile 7 du capot 5. Bien entendu, il est possible de munir la face interne 13 de la partie mobile 7 du capot 5 de trois, quatre ou plus moyens d'engagement 14 par rail 1 1 de manière à assurer un bon guidage du coulissement de la partie mobile 7 le long de la partie fixe 6 du capot 5. Dans un autre exemple de réalisation, le coulissement peut être obtenu au moyen de rainures dans lesquelles viennent s'engager des protubérances longilignes lesdites rainures et protubérances étant disposées de manière à coïncider.The movable part 7 of the cover 5 is provided on an inner face 13 intended to come opposite the guide rails 11, two rows of engagement means 14 (a single row visible in FIGS. 2A, 2B and FIG. 2C) adapted to engage the guide rails 11, so as to guide the sliding of the movable portion 7 of the cover 5 along the fixed portion 6 of said cover 5. For example, the engagement means 14 are rollers arranged in pairs, on either side of the guide rails 11. Each guide rail January 1 coincides with at least two pairs of rollers 14 on the inner face 13 of the movable portion 7 of said cover 5. In the example shown, each guide rail 11 coincides with two engagement means 14, situated respectively at the top and bottom of the movable portion 7 of the cover 5. Of course, it is possible to provide the inner face 13 of the movable portion 7 of the cover 5 of three, four or more 14 rail engagement means 1 1 to ensure a good guiding of the sliding of the mobile part 7 along the fixed part 6 of the cover 5. In another embodiment, the sliding can be obtained by means of grooves in which are engaged longilinear protuberances said grooves and protuberances being arranged so as to coincide.
Avantageusement, la face interne 13 de la partie mobile 7 du capot 5 est munie d'un dispositif de verrouillage permettant de maintenir, selon les besoin, ladite partie mobile 7 en position basse ou haute et donc en position fermée et/ou en position ouverte le capot 5. Par exemple, le dispositif de verrouillage peut comporter un système de tringlerie 17 tel que représenté à la figure 3. Le dispositif de verrouillage selon l'invention comporte par ailleurs des petits orifices ménagés sur des montants avant et arrière fixe de la nacelle (non représentés), ces dits orifices étant aptes à recevoir des picots 19 de blocage du système de tringlerie 17. Notamment, les orifices peuvent être ménagés sur les rails de guidage 1 1 le long desquels la partie mobile 7 du capot 5 coulisse.Advantageously, the inner face 13 of the movable portion 7 of the cover 5 is provided with a locking device to maintain, as necessary, said movable portion 7 in the low or high position and therefore in the closed position and / or in the open position 5. For example, the locking device may comprise a system linkage 17 as shown in Figure 3. The locking device according to the invention further comprises small orifices provided on fixed front and rear uprights of the nacelle (not shown), said orifices being adapted to receive pimples 19 In particular, the orifices may be formed on the guide rails 1 1 along which the movable portion 7 of the cover 5 slides.
Le système de tringlerie 17 comporte une tige 20, disposée dans l'épaisseur de la partie mobile 7 du capot 5, et légèrement incurvée de manière à épouser le contour en arc de cercle de ladite partie mobile 7. La tige 20 s'étend dans la hauteur H de la partie mobile 7 du capot 5. La tige 20 est munie de plusieurs paires de bielles 21 (trois seulement sont représentées sur la figure 4) espacées régulièrement le long de ladite tige 20. Chaque bielle 21 est reliée, à l'endroit d'une extrémité libre opposée à l'extrémité reliée à la tige 20, à un picot 19 de blocage. Chaque paire de bielles comporte une bielle 21 avant et une bielle 21 arrière.The linkage system 17 comprises a rod 20, disposed in the thickness of the movable portion 7 of the cover 5, and slightly curved so as to fit the circular arcuate contour of said movable part 7. The rod 20 extends into the height H of the movable portion 7 of the cover 5. The rod 20 is provided with several pairs of rods 21 (only three are shown in Figure 4) spaced regularly along said rod 20. Each rod 21 is connected to the place of a free end opposite the end connected to the rod 20, a pin 19 blocking. Each pair of rods has a connecting rod 21 before and a connecting rod 21 back.
Le système de tringlerie 17 selon l'invention permet d'engager les picots 19 avant, solidaires des bielles 21 avant, dans des orifices ménagés sur le rail de guidage 11 avant, et les picots 19 arrières, solidaires des bielles 21 arrières, dans des orifices similaires ménagés sur le rail de guidage 11 arrière. Par exemple, la tige 20 est située au milieu de la partie mobile 7 du capot 5, de sorte que les picots 19 doivent avoir une longueur suffisante pour pouvoir atteindre les rails 11 sur lesquels les orifices sont ménagés. Notamment, les rails de guidage 11 peuvent coïncider avec les bords extérieurs de la partie mobile 7 du capot 5, les picots 19 devant alors chacun s'étendre sur une demi largeur de ladite partie mobile 7 pour atteindre les rails de guidage 11 avant et arrière et donc les orifices.The linkage system 17 according to the invention allows to engage the pins 19 before, secured to the connecting rods 21 before, in orifices provided on the guide rail 11 before, and the rear pins 19, integral with the rods 21 rear, in similar orifices provided on the rear guide rail 11. For example, the rod 20 is located in the middle of the movable portion 7 of the cover 5, so that the pins 19 must be of sufficient length to reach the rails 11 on which the orifices are formed. In particular, the guide rails 11 may coincide with the outer edges of the movable portion 7 of the cover 5, the pins 19 then each to extend over a half width of said movable portion 7 to reach the guide rails 11 front and rear and therefore the orifices.
En position capot fermé, le dispositif de verrouillage selon l'invention permet de maintenir la partie mobile 7 du capot 5 en partie inférieure dudit capot 5, par l'intermédiaire des picots 19 insérés dans les orifices situés en partie basse des rails 11 de guidage. En position capot ouvert, le dispositif de verrouillage selon l'invention permet de maintenir la partie mobile 7 du capot 5 en position haute par l'intermédiaire des mêmes 19 insérés dans des orifices situés en partie haute des rails 11 de guidage.In closed hood position, the locking device according to the invention makes it possible to maintain the mobile part 7 of the cover 5 in the lower part of said cover 5, by means of the pins 19 inserted in the orifices located in the lower part of the guide rails 11 . In the open hood position, the locking device according to the invention makes it possible to keep the mobile part 7 of the cover 5 in the high position by means of the same 19 inserted in orifices located in the upper part of the guide rails 11.
Dans l'exemple représenté à la figure 3, le système de tringlerie 17 de l'invention est actionné par l'intermédiaire d'au moins une des deux poignées 9, 10 situées sur la partie mobile 7 du capot 5. Les poignées 9 et 10 permettent de verrouiller et déverrouiller le système de tringlerie 17. En position déverrouillée, les bielles 21 sont rétractées et s'étendent dans le prolongement de la tige 20, de sorte que les picots 19 s'effacent pour ne pas gêner le coulissement de la partie mobile 7 du capot 5 le long de la partie fixe 6. A l'inverse, en position verrouillée, les bielles 21 s'étendent sensiblement perpendiculairement à la tige 20, les picots 19 étant alors déployés axialement, les uns vers l'avant, les autres vers l'arrière, de manière à être insérés dans les orifices correspondants ménagés dans les 11 de guidage avant et arrière.In the example shown in FIG. 3, the linkage system 17 of the invention is actuated via at least one of the two handles 9, 10 located on the movable portion 7 of the cover 5. The handles 9 and 10 are used to lock and unlock the linkage system 17. In the unlocked position, the rods 21 are retracted and extend in the extension of the rod 20, so that the pins 19 are erased so as not to impede the sliding of the movable portion 7 of the cover 5 along the fixed portion 6. Conversely, in the locked position, the connecting rods 21 extend substantially perpendicular to the rod 20, the pins 19 are then deployed axially, one forward, the other rearwardly, so as to be inserted into the corresponding orifices formed in the front and rear guide 11.
Par exemple, lorsque la partie mobile 7 du capot 5 est située en partie basse et que le capot 5 est en position fermée, il est possible de déverrouiller le système de tringlerie 17 par l'intermédiaire de la poignée supérieure 10, en tournant d'un quart de tour ladite poignée 10. La tige 20 est alors tirée vers le haut rétractant ainsi les bielles 21 et picots 19 correspondants. Les picots internes 19 sont dégagés des orifices situés en partie basse des rails 11 de guidage, autorisant le coulissement de la partie mobile 7 vers le haut, le long de la partie fixe 6 du capot 5. Lorsque la poignée supérieure 10 disparaît à l'intérieur de la nacelle 1 , la remontée de la partie mobile 7 du capot 5 le long de la partie fixe 6 se fait à l'aide de la poignée inférieure 9. Lorsque la partie mobile 7 du capot 5 a une position souhaitée par rapport à la partie fixe 6 dudit capot 5, on verrouille à nouveau le système de tringlerie 17 en tournant d'un quart de tour la poignée inférieure 9, afin de tirer la tige 20 vers ladite poignée inférieure 9, ce qui permet le déploiement des bielles 21 et des picots 19 vers les orifices ménagés à cet effet dans la partie supérieure des rails 11 de guidage avant et arrière.For example, when the movable portion 7 of the cover 5 is located in the lower part and the cover 5 is in the closed position, it is possible to unlock the linkage system 17 via the upper handle 10, turning of a quarter of a turn said handle 10. The rod 20 is then pulled upwards thus retracting the connecting rods 21 and pins 19 corresponding. The internal pins 19 are disengaged from the orifices located in the lower part of the guide rails 11, allowing sliding of the mobile part 7 upwards, along the fixed part 6 of the cover 5. When the upper handle 10 disappears at the inside the nacelle 1, the raising of the mobile part 7 of the cover 5 along the fixed part 6 is done using the lower handle 9. When the movable portion 7 of the cover 5 has a desired position with respect to the fixed part 6 of said cover 5, the linkage system 17 is again locked by turning the bottom handle 9 by a quarter of a turn in order to pull the rod 20 towards the lower handle 9, which allows the rods 21 to be deployed. and pins 19 to the orifices provided for this purpose in the upper part of the front and rear guide rails 11.
Lorsqu'on souhaite à nouveau fermer le capot 5, il suffit de tourner la poignée inférieure 9 d'un quart de tour en sens inverse, de manière à pousser vers le haut la tige 20 et ainsi rétracter les bielles 21 et picots 19. La partie mobile 7 du capot 5 retrouve alors sa mobilité. On peut ensuite tirer la partie mobile 7 du capot 5 vers le bas, au moyen de la poignée inférieure 9 puis de la poignée supérieure 10 lorsque celle-ci est désengagée de dessous la partie fixe 6 du capot 5.When it is desired to close the cover 5 again, it suffices to turn the bottom handle 9 a quarter turn in the opposite direction, so as to push up the rod 20 and thus retract the rods 21 and pins 19. The mobile part 7 of the hood 5 then finds its mobility. The moving part 7 of the cover 5 can then be pulled down by means of the lower handle 9 and then the upper handle 10 when the latter is disengaged from under the fixed part 6 of the cover 5.
Pour verrouiller en position fermée la partie mobile 7 du capot 5, on tourne d'un quart de tour la poignée supérieure 10, de manière à étendre à nouveau les bielles 21 et les picots 19 du système de tringlerie 20.To lock the movable part 7 of the cover 5 in closed position, the upper handle 10 is rotated by a quarter of a turn so as to extend to again the connecting rods 21 and the pins 19 of the linkage system 20.
Dans les exemples représentés aux figures 1 et 2, les dimensions de la partie mobile 7 du capot 5 sont sensiblement égales aux dimensions de la partie fixe 6 dudit capot 5. Il est également possible de prévoir une partie mobile 7 dont les dimensions sont strictement inférieures aux dimensions de la partie fixe 6 du capot 5. Par exemple, la partie mobile 7 du capot 5 a une hauteur strictement inférieure à la hauteur de la partie fixe 6. De même, il est possible que la longueur de la partie mobile 7 du capot 5 soit inférieure à la longueur de la partie fixe 6. In the examples shown in Figures 1 and 2, the dimensions of the movable portion 7 of the cover 5 are substantially equal to the dimensions of the fixed portion 6 of said cover 5. It is also possible to provide a movable portion 7 whose dimensions are strictly lower. to the dimensions of the fixed portion 6 of the cover 5. For example, the movable portion 7 of the cover 5 has a height strictly less than the height of the fixed portion 6. Similarly, it is possible that the length of the movable portion 7 of the cover 5 is less than the length of the fixed part 6.

Claims

REVENDICATIONS
1 - Capot (5) de nacelle pour turboréacteur, caractérisé en ce qu'il est muni d'une partie fixe (6) et d'une partie mobile (7) s'étendant l'une au dessus de l'autre, la partie mobile étant apte à coulisser le long de la partie fixe, depuis une position fermée dans laquelle la partie mobile s'étend dans le prolongement de la partie fixe, jusqu'à une position ouverte dans laquelle la partie mobile est au moins partiellement superposée à la partie fixe.1 - Hood (5) nacelle for turbojet, characterized in that it is provided with a fixed part (6) and a movable part (7) extending one above the other, the mobile part being able to slide along the fixed part, from a closed position in which the movable part extends in the extension of the fixed part, to an open position in which the mobile part is at least partially superimposed on the fixed part.
2- Capot de nacelle selon la revendication 1 , caractérisé en ce que la partie fixe est située en partie supérieure du capot, la partie mobile étant située en partie inférieure dudit capot.2- basket cover according to claim 1, characterized in that the fixed part is located in the upper part of the cover, the movable part being located in the lower part of said cover.
3- Capot de nacelle selon l'une des revendications 1 à 2, caractérisé en ce que la partie mobile comporte des moyens d'engagement (14) aptes à s'engager dans des rails (11 ) de guidage du coulissement, lesdits rails de guidage pouvant être montés fixes dans la nacelle.3- platform cover according to one of claims 1 to 2, characterized in that the movable portion comprises engagement means (14) adapted to engage in rails (11) for guiding the sliding, said rails of guidance which can be fixedly mounted in the nacelle.
4- Capot de nacelle selon l'une des revendications 1 à 3, caractérisé en ce que la partie mobile du capot coulisse le long d'une face interne (12) de la partie fixe dudit capot.4- basket cover according to one of claims 1 to 3, characterized in that the movable part of the cover slides along an inner face (12) of the fixed part of said cover.
5- Capot de nacelle selon l'une des revendications 1 à 4, caractérisé en ce que la partie mobile est munie d'au moins une poignée supérieure (10) située en partie supérieure de la partie mobile et d'au moins une poignée inférieure (9) située en partie inférieure de la partie mobile.5- basket cover according to one of claims 1 to 4, characterized in that the movable portion is provided with at least one upper handle (10) located in the upper part of the movable part and at least one lower handle (9) located in the lower part of the movable part.
6- Capot de nacelle selon la revendication 5, caractérisé en ce qu'au moins une poignée supérieure et/ou inférieure est escamotable. 7- Capot de nacelle selon l'une des revendications 1 à 6, caractérisé en ce qu'il comporte un dispositif de verrouillage (17, 19, 20, 21 ) apte à verrouiller la partie mobile du capot en position fermée et/ou ouverte.6- basket cover according to claim 5, characterized in that at least one upper and / or lower handle is retractable. 7- Nacelle cover according to one of claims 1 to 6, characterized in that it comprises a locking device (17, 19, 20, 21) adapted to lock the movable part of the hood in the closed position and / or open .
8- Capot de nacelle selon la revendication 7, caractérisé en ce que le dispositif de verrouillage comporte des picots (19) situés sur une face interne (13) de la partie mobile du capot, lesdits picots étant destinés à être insérés dans des orifices ménagés sur des montants fixes de la nacelle8- nacelle cover according to claim 7, characterized in that the locking device comprises pins (19) located on an inner face (13) of the movable part of the cover, said pins being intended to be inserted into openings orifices on fixed amounts of the nacelle
9- Capot de nacelle selon l'une des revendications 7 à 8, caractérisé en ce que le dispositif de verrouillage est actionné par au moins une poignée (9, 10) située sur la partie mobile du capot. 10- Nacelle (1) de turboréacteur munie d'au moins un capot (5) selon l'une des revendications 1 à 9. 9- nacelle cover according to one of claims 7 to 8, characterized in that the locking device is actuated by at least one handle (9, 10) located on the movable part of the cover. 10- nacelle (1) turbojet engine provided with at least one cover (5) according to one of claims 1 to 9.
PCT/FR2006/050804 2005-09-08 2006-08-17 Nacelle cowling for turbojet and nacelle comprising at least one such cowling WO2007028916A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US12/065,629 US8091832B2 (en) 2005-09-08 2006-08-17 Nacelle cowling for turbojet and nacelle comprising at least one such cowling
JP2008529665A JP4852611B2 (en) 2005-09-08 2006-08-17 Nacelle cover for turbojet engine and nacelle provided with at least one such cover
BRPI0615736-0A BRPI0615736A2 (en) 2005-09-08 2006-08-17 turbo-reactor nacelle cap and nacelle cap containing at least this cap
DE602006006693T DE602006006693D1 (en) 2005-09-08 2006-08-17 BELT COVERING FOR A RADIANT TURBINE AND GONDOLOR WITH AT LEAST ONE SUCH FAIRING
EP06808245A EP1922251B1 (en) 2005-09-08 2006-08-17 Nacelle cowling for turbojet and nacelle comprising at least one such cowling
AT06808245T ATE430690T1 (en) 2005-09-08 2006-08-17 NACHEL COVER FOR A JET TURBINE AND NACHEL HAVING AT LEAST ONE SUCH COVER
CA2621216A CA2621216C (en) 2005-09-08 2006-08-17 Nacelle cowling for turbojet and nacelle comprising at least one such cowling

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0552717A FR2890378B1 (en) 2005-09-08 2005-09-08 NACELLE HOOD FOR TURBOJET AND NACELLE COMPRISING AT LEAST ONE SUCH HOOD.
FR0552717 2005-09-08

Publications (1)

Publication Number Publication Date
WO2007028916A1 true WO2007028916A1 (en) 2007-03-15

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Application Number Title Priority Date Filing Date
PCT/FR2006/050804 WO2007028916A1 (en) 2005-09-08 2006-08-17 Nacelle cowling for turbojet and nacelle comprising at least one such cowling

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US (1) US8091832B2 (en)
EP (1) EP1922251B1 (en)
JP (1) JP4852611B2 (en)
CN (1) CN101258072A (en)
AT (1) ATE430690T1 (en)
BR (1) BRPI0615736A2 (en)
CA (1) CA2621216C (en)
DE (1) DE602006006693D1 (en)
FR (1) FR2890378B1 (en)
RU (1) RU2410292C2 (en)
WO (1) WO2007028916A1 (en)

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FR2890378A1 (en) 2007-03-09
US8091832B2 (en) 2012-01-10
CA2621216A1 (en) 2007-03-15
BRPI0615736A2 (en) 2011-05-24
EP1922251A1 (en) 2008-05-21
JP4852611B2 (en) 2012-01-11
EP1922251B1 (en) 2009-05-06
DE602006006693D1 (en) 2009-06-18
FR2890378B1 (en) 2009-01-16
ATE430690T1 (en) 2009-05-15
JP2009507701A (en) 2009-02-26
RU2410292C2 (en) 2011-01-27
CA2621216C (en) 2014-01-21
CN101258072A (en) 2008-09-03
RU2008113394A (en) 2009-10-20
US20080277529A1 (en) 2008-11-13

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